H-89

H-89 is a protein kinase inhibitor with greatest effect on protein kinase A (PKA).[1] H-89, derived from H-8 (N-[2-(methylamino)ethyl]-5-isoquinoline-sulfonamide),[2] was initially believed to act specifically as an inhibitor of PKA,[3] being 30 times more potent than H-8 at inhibiting PKA and 10 times less potent at inhibiting protein kinase G. It achieves this through competitive inhibition of the adenosine triphosphate (ATP) site on the PKA catalytic subunit.[4] However, subsequent work has suggested a variety of additional effects such as inhibition of other protein kinases (IC50 values of 80, 120, 135, 270, 2600 and 2800 nM for S6K1, MSK1, PKA, ROCKII, PKBα and MAPKAP-K1b respectively),[5] and direct inhibition of various potassium currents.[6]

For the Heath H-89 microcomputer, see Zenith Z-89.
H-89
Names
IUPAC name
N-[2-[[3-(4-Bromophenyl)-2-propenyl]amino]ethyl]-5-isoquinolinesulfonamide
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.201.023
UNII
Properties
C20H20BrN3O2S
Molar mass 446.36 g·mol−1
Soluble to 25 mM
Solubility in other solvents up to 100 mM in DMSO
Hazards
Main hazards Exposure may cause irritation to eyes, mucous membranes, upper respiratory tract, and skin.
S-phrases (outdated) S22-S24/25-S36/37/39
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

In addition to its use in studying mechanisms of cell signalling, H-89 has also been used experimentally in vivo. H-89 has been shown to increase the threshold and latency of pentylenetetrazol-induced seizures [7] and decrease morphine withdrawal symptoms in mice.[8]

References
  1. Marunaka, Yoshinori; Niisato, Naomi (2003). "H89, an inhibitor of protein kinase A (PKA), stimulates Na+ transport by translocating an epithelial Na+ channel (ENaC) in fetal rat alveolar type II epithelium". Biochemical Pharmacology. 66 (6): 1083–9. doi:10.1016/S0006-2952(03)00456-8. PMID 12963496.
  2. Hidaka, H.; Inagaki, M.; Kawamoto, S.; Sasaki, Y. (1984-10-09). "Isoquinolinesulfonamides, novel and potent inhibitors of cyclic nucleotide dependent protein kinase and protein kinase C". Biochemistry. 23 (21): 5036–5041. doi:10.1021/bi00316a032. ISSN 0006-2960. PMID 6238627.
  3. Chijiwa, T.; Mishima, A.; Hagiwara, M.; Sano, M.; Hayashi, K.; Inoue, T.; Naito, K.; Toshioka, T.; Hidaka, H. (1990-03-25). "Inhibition of forskolin-induced neurite outgrowth and protein phosphorylation by a newly synthesized selective inhibitor of cyclic AMP-dependent protein kinase, N-[2-(p-bromocinnamylamino)ethyl]-5-isoquinolinesulfonamide (H-89), of PC12D pheochromocytoma cells". The Journal of Biological Chemistry. 265 (9): 5267–5272. ISSN 0021-9258. PMID 2156866.
  4. Murray, A. J. (2008). "Pharmacological PKA Inhibition: All May Not Be What It Seems". Science Signaling. 1 (22): re4. doi:10.1126/scisignal.122re4. PMID 18523239.
  5. Lochner, A.; Moolman, J. A. (2006). "The Many Faces of H89: A Review". Cardiovascular Drug Reviews. 24 (3–4): 261–74. doi:10.1111/j.1527-3466.2006.00261.x. PMID 17214602.
  6. Pearman, Charles; Kent, William; Bracken, Nicolas; Hussain, Munir (August 2006). "H-89 inhibits transient outward and inward rectifier potassium currents in isolated rat ventricular myocytes". British Journal of Pharmacology. 148 (8): 1091–1098. doi:10.1038/sj.bjp.0706810. ISSN 0007-1188. PMC 1752020. PMID 16799649.
  7. Hosseini-Zare, Mahshid Sadat; Salehi, Forouz; Seyedi, Seyedeh Yalda; Azami, Kian; Ghadiri, Tahereh; Mobasseri, Mohammad; Gholizadeh, Shervin; Beyer, Cordian; Sharifzadeh, Mohammad (2011). "Effects of pentoxifylline and H-89 on epileptogenic activity of bucladesine in pentylenetetrazol-treated mice". European Journal of Pharmacology. 670 (2–3): 464–70. doi:10.1016/j.ejphar.2011.09.026. PMID 21946102.
  8. Seyedi, Seyedeh Y.; Salehi, Forouz; Payandemehr, Borna; Hossein, Sara; Hosseini-Zare, Mahshid S.; Nassireslami, Ehsan; Yazdi, Behnoosh B.; Sharifzadeh, Mohammad (2014). "Dual effect of cAMP agonist on ameliorative function of PKA inhibitor in morphine-dependent mice". Fundamental & Clinical Pharmacology. 28 (4): 445–54. doi:10.1111/fcp.12045. PMID 24033391.
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